On Picture (2+1)-TQFTs

@article{Freedman2008OnP,
  title={On Picture (2+1)-TQFTs},
  author={Maurice J. Freedman and Chaturbhuja Nayak and Kevin Walker and Zhihe Wang},
  journal={arXiv: Quantum Algebra},
  year={2008}
}
The goal of the paper is an exposition of the simplest $(2+1)$-TQFTs in a sense following a pictorial approach. In the end, we fell short on details in the later sections where new results are stated and proofs are outlined. Comments are welcome and should be sent to the 4th author. 
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